Ring System for Guiding a Medium in an Abrasive Disk

ABSTRACT

The invention relates to a ring system for accommodating a medium, to a method for compressing and guiding a medium for use in any known grinding methods for abrasive disks that consist of a support ( 1 ) and an abrasive lining ( 2 ) disposed on the circumference or face thereof for use on the circumference or the face of a work piece. The ring system provides a cavity and guide system for the coolant and lubricant. In said system the medium is accommodated, compressed and guided to the desired location of use. Optionally, the medium can be transported between the work piece and the abrasive lining ( 2 ) and/or to the interior or exterior of the abrasive disk to the desired location of use for the purpose of cooling, lubrication and cleaning.

The invention relates a ring assembly for grinding wheels according to the preamble of claim 1. When a workpiece, independent of its structure and of its grinding layer, is subjected to a grinding procedure there are high temperatures in the work area of the grinding tool that can be controlled by means of a cooling and lubricating fluid. It is the object of the invention to improve the cooling and lubrication, even of grinding wheels already in use without large modification efforts. This is achieved by the fact that the cooling and lubricating treatment fluid is received, pressurized and fed to the necessary points of application in the grinding operation by a ring assembly mounted on the grinding wheel. With this system for conveying lubrication and coolant, the treatment fluid can be transported more directly to the designated points of application. Additionally, the grinding body is cooled more constantly and more strongly. This results in better grinding performances and improved quality at the workpiece as well as in increased grinding tool life.

Significant Details.

Ring for Holding the Treatment Fluid

The ring for holding the treatment fluid can be composed of many different materials and can be made by many different processing and machining procedures (e.g. machining, metal shaping, casting). This fluid-holding ring with its central opening serves to create a hollow chamber and thus feeds the treatment-fluid into the inner body of the grinding wheel. The fluid-holding ring can be made of one or more parts and is connected and fixed to the grinding body by means of a groove formed in the grinding body. Optionally, the fluid-holding ring can have bores which transport the cooling and lubricating treatment fluid in concentrated form to the designated point of application at the inner side of the grinding wheel.

Ring for Feeding and Pressurizing the Treatment Fluid

The ring for feeding and PRESSURIZING the treatment fluid can be composed of many different materials and made by many different processing and machining procedures (e.g. machining, metal shaping, casting). The feeding/pressurizing ring can be made of one or more parts and is connected and fixed to the grinding body by means of a groove formed in the grinding body. This ring is also mounted on an inner side of the grinding body and with its recesses serves for PRESSURIZING the treatment fluid. Thus, the cooling and lubricating liquid is forced to assume the circumferential speed of the grinding wheel. The pressurized treatment fluid is either transported through bores in the grinding body to an outer edge of the grinding wheel to the ring for controlling the liquid discharge and is thus transported to the point of application, or it is moved through bores in the grinding body and its abrasive layer directly to the point of application.

Ring for Controlling Treatment-Fluid Discharge

The ring for controlling treatment-fluid discharge can be composed of many different materials and made by many different processing and machining procedures (e.g. machining, metal shaping, casting). The ring for controlling treatment-fluid discharge can be made of one or more parts and is connected and fixed to the grinding body by means of a groove arranged in the grinding body. With this ring the pressurized treatment fluid is feed to the outer edge of the grinding wheel to the desired point of application.

By means of the invention, the known and already used grinding wheels can be improved without significant modification when manufacture or retrofitted, particularly with respect to improved grinding characteristics, longer service life, less machine downtime, less machining time, improved repeating exactness and reduced heating of the grinding wheel and the workpiece as well as improved surface quality of the workpiece. Thanks to the improved lubricating and cooling effect there are no crystalline is modifications of the processed materials.

The drawing shows an embodiment of the object of the invention.

FIG. 1 shows a section through a 11V9 grinding wheel according to the line A of FIG. 2;

FIG. 2 shows a view of the 11v9 grinding wheel;

FIG. 3 shows a variation of the bore extending through the body and the grinding layer to the point of application;

FIG. 4 shows a view of the ring for holding the treatment fluid;

FIG. 5 shows a view of the ring for holding the treatment fluid with discharge openings for controlling treatment-fluid discharge;

FIG. 6 shows a view of the ring for feeding and PRESSURIZING the treatment fluid;

FIG. 7 shows a view of the ring for controlling treatment-fluid discharge;

FIG. 8 shows a view of the body with prefabricated grooves without an installed ring assembly.

FIGS. 1-8:

The grinding wheel consists of a body (1) and a grinding layer (2) with a mounted fluid-holding ring (3) through a central opening of which a treatment fluid is fed to the grinding wheel. A ring (4) for feeding and PRESSURIZING the treatment fluid feeds, this cooling and lubricating treatment fluid either by means of connecting bores (5) to a ring (6) for controlling treatment-fluid discharge or through discharge bores (7) in the body and grinding layer. According to the design of the grinding wheel and according, to requirements, the treatment fluid can also be fed through discharge openings (9) to a grinding point at an inner edge of the grinding wheel. All the rings of the system are anchored in preformed grooves (8). Due to the centrifugal force of the turning grinding wheel, the treatment fluid is pressurized and transported through the passages, cutouts or partitions (10) in the feeding/pressurizing ring in concentrated form to the contact area at the grinding layer and workpiece. 

1. A grinding wheel and ring assembly for feeding a treatment fluid for all known grinding procedures and grinding wheels consisting of a body, a grinding layer provided on an outer or end face for edge or face grinding, characterized in that at least one ring serves for holding the treatment fluid in the grinding body and/or at least one ring serves to feed and/or pressurize of the treatment fluid.
 2. The grinding wheel and ring assembly for feeding a treatment fluid according to claim 1, characterized in that additionally at least on ring serves for controlling treatment-fluid discharge.
 3. The grinding wheel and ring assembly for feeding a treatment fluid according to claim 1 characterized in that the cooling and lubricating treatment fluid is fed into an annular cavity of the fluid-holding ring basically by treatment-fluid nozzles and tubes.
 4. The grinding wheel and ring assembly for feeding a treatment fluid according to claim 1, characterized in that the cooling and lubricating treatment fluid is fed in basically adjacent a machine spindle.
 5. The grinding wheel and ring assembly for feeding a treatment fluid according to claim 1 characterized in that connecting bores in the fluid-holding ring conduct the treatment fluid to move between opposite sides of the grinding-wheel body.
 6. The grinding wheel and ring assembly for feeding a treatment fluid according to claim 1, characterized in that the discharge openings in the fluid-holding ring directly transport the treatment fluid to the point of application.
 7. The grinding wheel and ring assembly for feeding a treatment fluid according to claim 1, characterized in that at least one ring is provided with chambers for a higher pressurization of the treatment fluid that are created by partitions, recesses or cut-outs.
 8. The grinding wheel and ring assembly for feeding a treatment fluid according to claim 1, characterized in that discharge bores in the body and in the grinding layer allow the treatment fluid to discharge at a contact area between the grinding layer and the workpiece. 